CANON TR8520 AND WPA3 WIFI

I am having an issue with connecting my Canon TR8520 printer to my wireless internet. I just switched my wifi modem, now my printer won't connect. I am not asked for the password during set up. I have contacted Canon and was advised, the printer is looking for WPA2 connection … and my WIFI is WPA3. I have called technical support with Xfinity to no avail. They just keep sending me back to Canon. Please advise how to connect my printer, please.  I have the new white box modem.